Procs

func borrowingSub[T: SomeSignedInt](a, b: T; borrowIn: bool): (T, bool) {.
    ...raises: [], inline, noinit, ...gcsafe.}

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func borrowingSub[T: SomeUnsignedInt](a, b: T; borrowIn: bool): (T, bool) {.
    ...raises: [], inline, noinit, ...gcsafe.}

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func carryingAdd[T: SomeSignedInt](a, b: T; carryIn: bool): (T, bool) {.
    ...raises: [], inline, noinit, ...gcsafe.}

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func carryingAdd[T: SomeUnsignedInt](a, b: T; carryIn: bool): (T, bool) {.
    ...raises: [], inline, noinit, ...gcsafe.}

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func narrowingDiv(uHi, uLo, v: uint32): (uint32, uint32) {....raises: [], inline,
    noinit, ...gcsafe, tags: [], forbids: [].}

Division uint64 by uint32.

Warning:

• if uHi == d, quotient does not fit in an uint32
• if uHi > d result is undefined

To avoid issues, uHi, uLo, and v are normalized i.e. shifted (== multiplied by the same power of 2) so that the most significant bit in d is set.

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func narrowingDiv(uHi, uLo, v: uint64): (uint64, uint64) {....raises: [], inline,
    noinit, ...gcsafe, tags: [], forbids: [].}

Knuth's Algorithm D implementation. Source   Edit  

func overflowingAdd[T: SomeSignedInt](a, b: T): (T, bool) {....raises: [], inline,
    noinit, ...gcsafe.}

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func overflowingAdd[T: SomeUnsignedInt](a, b: T): (T, bool) {....raises: [],
    inline, noinit, ...gcsafe.}

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func overflowingSub[T: SomeSignedInt](a, b: T): (T, bool) {....raises: [], inline,
    noinit, ...gcsafe.}

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func overflowingSub[T: SomeUnsignedInt](a, b: T): (T, bool) {....raises: [],
    inline, noinit, ...gcsafe.}

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func saturatingAdd[T: SomeSignedInt](a, b: T): T {....raises: [], inline, noinit,
    ...gcsafe.}

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func saturatingAdd[T: SomeUnsignedInt](a, b: T): T {....raises: [], inline, noinit,
    ...gcsafe.}

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func saturatingSub[T: SomeSignedInt](a, b: T): T {....raises: [], inline, noinit,
    ...gcsafe.}

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func saturatingSub[T: SomeUnsignedInt](a, b: T): T {....raises: [], inline, noinit,
    ...gcsafe.}

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func wideningMul(a, b: int32): (int32, uint32) {....raises: [], inline, noinit,
    ...gcsafe, tags: [], forbids: [].}

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func wideningMul(a, b: int64): (int64, uint64) {....raises: [], inline, noinit,
    ...gcsafe, tags: [], forbids: [].}

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func wideningMul(a, b: uint32): (uint32, uint32) {....raises: [], inline, noinit,
    ...gcsafe, tags: [], forbids: [].}

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func wideningMul(a, b: uint64): (uint64, uint64) {....raises: [], inline, noinit,
    ...gcsafe, tags: [], forbids: [].}

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func wideningMulAdd(a, b, c, d: uint32): (uint32, uint32) {....raises: [], inline,
    noinit, ...gcsafe, tags: [], forbids: [].}

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func wideningMulAdd(a, b, c, d: uint64): (uint64, uint64) {....raises: [], inline,
    noinit, ...gcsafe, tags: [], forbids: [].}

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func wideningMulAdd(a, b, c: uint32): (uint32, uint32) {....raises: [], inline,
    noinit, ...gcsafe, tags: [], forbids: [].}

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func wideningMulAdd(a, b, c: uint64): (uint64, uint64) {....raises: [], inline,
    noinit, ...gcsafe, tags: [], forbids: [].}

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